Concrete structure.



R. ANDERSON.' CONCRETE CTR-UCT'URr-J. .A APPLICATION FILED 31111.18, 1911.

3 SHEETS-SHEET l.

MCCCNMO MV1/M1;

@gum/@11 v R. ANDERSON.

CONCRETE STRUCTURE.

APPLICATION FILED JAN. 1B, 1011` Pazauef Nw QE,

3 SHEETS-SHEET 2.

R. ANDERSON. CONQRETB STRUGQU'RE.

Patented Nov. 28, 1911 mio/www wf www 3 SHEETSSHEET 3,

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CHUNGBVETL STRUCTURE.

specification of Itctters Patent.

Application filed January le, 191i.

Patented lli ed, lltltlll.

serial no. ceases;

2lb all whom, it may concern.'

lle it known that l, llonnr ANDERSON, a citizen of the United States of America, and resident of Cincinnati., county of Hamilton, and State oit hio, have invented certain :new and useful lmprovements in Concrete Structures, oi' which the following is a speer ication.

This invention relates to concrete structures, and has for an object to produce a loor structure which may be formed between land be supported-trom concrete columns, steel. columns, combination steel and concrete columns, or any other kind of column which .is provided with lloor supporting brackets. i

.Stn object of my invention is a fiat floor construction ot reinforced concrete wherein the reintorciinf1 members do not in use become separated from the concrete.

Another object of my invention is a floor panel which is adapted to resist greater cornpressive and Ishearingl stresses, and to provide convenient locations `for the conduits of the building'.

ll. 'further object ot my invention is to produce a concrete structure in which. the ceilings arc flat. and inv 1which means are em.- ployed for dispensing with the ordinary form oit' column cap Vusually employed.

il. further object. is to produce a concrete structure in Vwhich means are employed tor;

reducing the cost oi. material and. labor.

A. further object isl to produce a new and improved VHoor supporting bracket for reinforced *t'foncrete colmnns.

rlhese and other objects l attain in a struclure emlunlyine` the features herein described, and illustrated in the drawings accompanyinpI this application and forming a part thereof.

Figure l is a partial sectional view on the line ljfl ot' Fig. 2, and illustrates a concrete structure embodying' features ot my invention.. lllig. 9. is a diagrammatic plan view ot column. brackets, in connection Wit-h reinvtorcing members ot' the Hoor system. Fig. 3 is a pers} ective view of a tloor supporting bracket, which embodies a detail of my invention, and is shown secured in place on thevertical reinforcing members oit a column; the column reinforcing members are shown broken away for convenience oli illustration.

@ne of the principal features et my invenu tion is the construction of the floor panels of a concrete structure, and of the mea-heifer supporting the floor panels ol the columns. l so form the floor panels that each panel includes a simple flat reinforced slab, which is suspended between adjacent supporting columns, by means of inclined reinforced members, Which are supported or sii/ung" from shelves or brackets mounted on the columns.

lin the drawings, l@ have shown an in1- provedform et bracket or shelf 'for sup porting the 'Hoor panels, and l Will tlrst den scribe the details of construction of the brackets and then of the door panels.

The concrete columns 4:, illustrated in the drawings, are provided with continuous vertically extending reinforcing,l rods or members 5, which preferably extend from the foundations to the top or the columns; it being understood that the usual. means may be employed for splicing short rods together, for the purpose of forming cneoontinuous reinforcing member. '.lhe columns shown are each provided with tour reinforcing members 5, but it will be understood that any desired number may be employed, With ont departing Jfrom the scope ot' my invention.

Each bracket t5 illustrated, consists oi. concentric octagonal bands *.7 and 8 and bracket rods 9. The band 7 of each bracket surrounds and contacts with the reinforcing members 5 of thecolumn and may, if desired, be supported on collars l0, which are mounted on the members 5. rlfhe band S of eavch bracket is supported by the bracket rods 9 and is preferably so located that its sides are parallel to the corresponding sides of the band 7. Each bracket rod 9 is bent into Ushaped loops llt-ll, and is bent around one ot the vertical members 5 immediately above the band 7. Each'loop l1 vof the bars extends around the band 8, and

the apexes of the loops are located approximately at the centers ot the sides ol the bands. Adjusting or tightening wedges 1Q are located between tliei}.apeg es of the loops and the band 8, and are employed in adjust ing the tension in the bars 9 and in adjusting the position of the band 8. The in turned or lower ends ci the rods 9 project into apertures provided in the collars 10 and in this manner are held firmly in place. .lf the collars l0 are not employed, the lower ends of the rods may abut against the member'f), around. which the rod is bent. The collars 10' are secured in place on the inemtiti dll

lll() lille' lll@ bers 5 by means ot' set screws 13 and firmly hold the rods in lace, since the eccentric loading on the ro s, relative to the collars, causes the collars to bind on themembers 5 and to firmly grip the members. Both of the bands 7 and 8 are employed in supporting `the floor slabs, or in supporting reinforcing members 15 of the tloor slabs. Each reinforcing member 15 is bent so-that it forms a horizontal reinforcing member for a tloor slab 16 and two inclined supporting members for the slab, which are supported at or near their ends on the brackets 6, at points considerably above the panels. 4The horizontal portion of each member l5 is located near the bottom of the slab 16, and the inclined portions are either bent at their ends to engage one or the other of the bands 7 or 8, or are continuous and extend across the shelves 6 and through adjacent licor slabs. With this arrangement, the individual reinforcing members 15 may be Ygrouped into three divisions, if desired; those which .are secured to the bands 8 of adjacent brackets; those which/are secured to the bands 7; and those which are supported by adjacent brackets, but extend over the brackets and through adjacent floor slabs. The members 15 secured to the brackets are turned either up or down to form hooks 17, which engage the bands 7 or 8, and the members are so spaced on the brackets that adequate space is provided for securing them in place, and also for sufficient concrete to insure the monolithic connection between the licor panels and they columns. Each member 15 transmits a portion of the weight of the floor slab and the weight carried by the Hoor slab, to the supporting brackets, and consequently to the columns.

The central` portion 16 of the floor Apanel is proportioned as `though it were a simple reinforced concrete slab supported at points coincident with thelmeetingf points of the horizontal and inclined portions of the reinforcing member 15, and designed to carry such loads as are expected will be located between said points on the panel. The structural or strain-resisting concrete 2O may be reduced in thickness between said points, andA so as to leave a channel or aisle between the thicker concrete Q1, which surrounds the inclined portions of member 15. This channel provides a convenient location for water and gas pipes 19 and 18, and for electric wires, etc. By making a horizontal portion in member 15,1 increase' the inclination to the horizontal of inclined portions of inembers 15, and hencev reduce the tension in said portions due to suspending the loads upon the slab, and likewise decrease any tendency of the reinforcing` member to change its form under stress and to separate from t e inclosing concrete. rlhe aisles may be titled up to the level ot' the thicker portion of'jthc,

tloor panels with any lsuitable material, such as dry cinders, hollow tile, wood or less eX- and through the columns, as well as those which are secured to the brackets adjacent to the columns, assist in strengthening the cantaliver brackets, solthat the points of sus* pension of the members 15 can loe-located at relatively great distances from-the centers of the columns, without increasing the thickness of the licor panels. Where the aisles are lled with a substantial ller, such, for example,'as concrete, the. Eller acts in compression and adds strength to the structure.

In Fig. 2, I have illustrated four supporting brackets 6 and the arrangement of the members '15 between the brackets. lt will beapparent that the members 15 are so, arranged that each bracket cooperates with adjacent brackets in supporting the door slabs'. providing octagonal bands 7 and 8, that all of the members 15 extending between adjacent brackets may be of equal length, that is, all the members extending between bands -8 of adjacent columns are of the same length,

and all of the membersextending between bands 7 of adjacent columns are of one length. The bands 7 and 8 may be made circular, if desired, but with such a construction, the members 15 extending between adjacent brackets will have to be of unequal I lengths to .accommodate the variations due to the curvature of the bands.

The construction of the brackets is'such that their widths may be proportioned in accordance with the distances between columns, so that every portion of each floor panel will be included within the mesh work of reinforcing members; andso that there will be no point between the columns, at which the panel is not sutliciently reinforced by tension members to withstand the pro# spective loads.

l. ln a concrete structure the combination of a column comprising vertical' reinforcing members, brackets secured to the reinforcing members, and a floor panel comprising a central comparatively thin slab and thick portions located between the `,slab and the columns, the slab being below` the brackets and comprising horizontal reinforcing members and concrete embedding said horizontal reinforcing members, and the thick portions of the panels compr1sin-g inclinedreinforcr ing members connecting the brackets 'and ieee,

the horizontal reinforcing members endl con.- l-L'ete eml'ledtlingg said inclined ieiniorcing menibers. l

ln n eonerete Structure, the combine tion of colunme lowing Sl.ml)-el1ppoti.ng ln'ucliete, llooi panels comprising company lively thin. slabs located between the col- :mins and thick portions located between the slabs and the columns, the Siebe being lo "ated below the level of the bieckete sind. comprising tension members :incl concrete embedding said. teneion members, and the thick portions comprising inclined tension members connecting the column brackets und the tension members of the Slab and. conci-ete emloelxlmgg the inclined. tension'. members.

3. ln combination with e concrete column und its vertical reinforcing members, bracket comprising the following member@ viz: an octegonel band. meente@ on Seid. members, L second. ectaigonel lmnil, lneeltet .rods mounted en seid. memlieife tot' enppeit ing.;` seid second. bend, :mtl adjusting Wetlgee loemtenl laetiveen. smid. 'rotte emi. enltl ee oncl i5 bend@ 4;. ltn. ceml'inetien with e cmmfete and ite veiftilcfil reinforcing nn iocle mounted. on ne l mounted on-szliil breek a between seiel lle-unil.. :intl ill ingl the positieve et will lnincn ln eombnmtion Jtli n. zmmzfete and. ite iverticel n` bi'acliet eonnirisingg the e in@1 U5 vin: an oetejonel bend. enliwiil-i eonnecting 'with Said. nienibeie turned :ironml the individuel. looped to include :i second. oc e neeencl oct-93mm b ezicl Seeenfl tiene, en( :incl collate meente seeming tlie ende cil 

